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Figure 9. The parcel of rough spinel on the left, reportedly from Tajikistan, contains pieces weighing up to 48.5 g. The seven faceted spinels on the right (9.04–28.16 ct) were fashioned from some of this rough.

Purplish Pink Spinel from Tajikistan: Before and After Cutting

Nicholas Sturman, March 1, 2009

Purplish Pink Spinel from Tajikistan: Before and After Cutting

The Seven Types of Yellow Sapphire and Their Stability to Light

Kurt Nassau and G. Kay Valente, December 1, 1987

The authors determined that there are actually seven types of "yellow" sapphire on the market today, which differ in the cause of colour and the stability of the colour to light.

Gemstone Durability: Design to Display

Deborah Dupont Martin, June 1, 1987

A treatise on the design, display, care and repair of fine gemstones.

"Modern" Jewellery: Retro to Abstract

Sally A. Thomas, March 1, 1987

A review of mid-20th century jewellery styles.

An Examination of Four Important Gems

C. W. Fryer and John I. Koivula, June 1, 1986

Several famous and historical gemstones in the Smithsonian's collection are examined and reported on.

Ruby and Sapphire Production and Distribution: A Quarter Century of Change

Russell Shor and Robert Weldon

During the past 25 years, the corundum market has been transformed from one of medium to high-priced gems to one that encompasses nearly all price ranges.

Abstract Header from the 2009 issue of Gems & Gemology

Abstracts; Summer 2009

Brendan M. Laurs, Thomas W. Overton

This article, from the Summer 2009 issue of Gems & Gemmology, is a compilation of abstracts of important gemmology-related articles published outside of Gems & Gemmology.

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